NL2008861C2 - Composition for soft tissue treatment. - Google Patents
Composition for soft tissue treatment. Download PDFInfo
- Publication number
- NL2008861C2 NL2008861C2 NL2008861A NL2008861A NL2008861C2 NL 2008861 C2 NL2008861 C2 NL 2008861C2 NL 2008861 A NL2008861 A NL 2008861A NL 2008861 A NL2008861 A NL 2008861A NL 2008861 C2 NL2008861 C2 NL 2008861C2
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- Netherlands
- Prior art keywords
- polysiloxane
- composition
- addition
- soft tissue
- container
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims description 59
- 210000004872 soft tissue Anatomy 0.000 title claims description 26
- 238000011282 treatment Methods 0.000 title claims description 25
- -1 polysiloxane Polymers 0.000 claims description 66
- 229920001296 polysiloxane Polymers 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 35
- 239000003054 catalyst Substances 0.000 claims description 17
- 239000003899 bactericide agent Substances 0.000 claims description 13
- 206010021639 Incontinence Diseases 0.000 claims description 11
- 238000011065 in-situ storage Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 9
- 210000001519 tissue Anatomy 0.000 claims description 9
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 229910021536 Zeolite Inorganic materials 0.000 claims description 5
- 238000002316 cosmetic surgery Methods 0.000 claims description 5
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 5
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 239000010457 zeolite Substances 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 4
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000002278 reconstructive surgery Methods 0.000 claims description 4
- 125000004469 siloxy group Chemical group [SiH3]O* 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 238000011471 prostatectomy Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 239000004971 Cross linker Substances 0.000 description 13
- 238000001723 curing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000000700 radioactive tracer Substances 0.000 description 8
- 210000003708 urethra Anatomy 0.000 description 7
- 238000013006 addition curing Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000011049 filling Methods 0.000 description 4
- 208000021302 gastroesophageal reflux disease Diseases 0.000 description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 206010046543 Urinary incontinence Diseases 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000004067 bulking agent Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000001506 calcium phosphate Substances 0.000 description 2
- 238000013005 condensation curing Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000005923 long-lasting effect Effects 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 208000034347 Faecal incontinence Diseases 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 206010061218 Inflammation Diseases 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910000389 calcium phosphate Inorganic materials 0.000 description 1
- 235000011010 calcium phosphates Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000011243 crosslinked material Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 229940117927 ethylene oxide Drugs 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000000744 eyelid Anatomy 0.000 description 1
- 210000003195 fascia Anatomy 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000004054 inflammatory process Effects 0.000 description 1
- 239000007972 injectable composition Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 210000003041 ligament Anatomy 0.000 description 1
- 210000000111 lower esophageal sphincter Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 210000004379 membrane Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 239000003605 opacifier Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 210000003899 penis Anatomy 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001843 polymethylhydrosiloxane Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052990 silicon hydride Inorganic materials 0.000 description 1
- 229920005573 silicon-containing polymer Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000003206 sterilizing agent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910000391 tricalcium phosphate Inorganic materials 0.000 description 1
- 235000019731 tricalcium phosphate Nutrition 0.000 description 1
- 229940078499 tricalcium phosphate Drugs 0.000 description 1
- 230000002485 urinary effect Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
- 210000001215 vagina Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/14—Macromolecular materials
- A61L27/18—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/025—Other specific inorganic materials not covered by A61L27/04 - A61L27/12
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/54—Biologically active materials, e.g. therapeutic substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/10—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices containing or releasing inorganic materials
- A61L2300/102—Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
- A61L2300/104—Silver, e.g. silver sulfadiazine
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2300/00—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices
- A61L2300/40—Biologically active materials used in bandages, wound dressings, absorbent pads or medical devices characterised by a specific therapeutic activity or mode of action
- A61L2300/404—Biocides, antimicrobial agents, antiseptic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2400/00—Materials characterised by their function or physical properties
- A61L2400/06—Flowable or injectable implant compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/34—Materials or treatment for tissue regeneration for soft tissue reconstruction
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Transplantation (AREA)
- Epidemiology (AREA)
- Dermatology (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Materials For Medical Uses (AREA)
- Prostheses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
P30636N LOO/JV
COMPOSITION FOR SOFT TISSUE TREATMENT TECHNICAL FIELD
The present invention relates generally to a composition for use in soft tissue treatment in a living creature such as a human being.
5 BACKGROUND OF THE ART
Soft tissue treatment, e.g. filling, augmenting, strengthening, reconstructing and expanding of soft tissue in humans is applied for various purposes. E.g. one way of treating incontinence is described in EP-A2-1516636. This treatment comprises a step of correcting the shape of the internal urethral orifice and/or the urethra with an elastic form stable material, derived from a 10 curable elastomer precursor composition. A patient is prepared for treatment according to standard medical procedures. Then a catheter is brought into the urethra until the injection needle reaches the bladder, e.g. indicated by the presence of a droplet of urine, and then retracted over a predetermined distance, e.g. in the range of 1-2 cm. At the position thus reached the wall of the urethra is punctured by the injection needle, and the composition is 15 forced from the respective container via a suitable flexible tube to the needle and deposited directly adjacent this wall in the respective tissue. Preferably the composition is applied at multiple locations surrounding the urethra. A preferred composition comprises about 60 -75 % by weight poly(dimethyl siloxane), about 2-5 % cross-linking agent, a diluent in the range of 10-20 % and about 10-20 % radiopaque powder, based on the weight of the entire 20 composition. During reaction (a condensation polymerisation) propanol is splitted off.
Gastroesophageal reflux disease (GERD) caused by malfunctioning of the lower esophageal sphincter can also be treated by injecting a suitable material into body sites surrounding the esophagus, as e.g. suggested in WO-A-03/072196 and EP-A2-1516636. In reconstructive surgery and cosmetic surgery soft tissues may also be filled using polymeric materials.
25 Now some drawbacks of this material known from EP-A2-1516636 have been discovered. One drawback concerns the dosing ratio of polymer: catalyst in the composition, which is in the order of 1000 : 1. As the starting composition is to be prepared shortly in advance of the actual application such as injection, otherwise (partial) curing would have rendered the material unworkable, in an appropriate amount typically in the ml range, the dosing amount of 30 the catalyst is in the microliter range. Any unintended deviation affects the actual curing time and other properties, which is rather unpredictable and therefore undesired. Thus precise control of the crosslinking reaction during application is difficult to achieve. Another drawback relates to the fact that some kind of shrink occurs during crosslinking. This shrink could cause voids to be present in the cured material, resulting in a locally insufficient volume thereof.
2
Furthermore it has appeared that the crosslinked material is susceptible to degradation over time in the presence of e.g. oxygen or oxygen containing compounds, resulting in gradually increasing brittleness. If the material becomes too brittle, fractures could be initiated and small pieces may be separated. These small pieces like any small particulates may show a 5 tendency of migration through the body. This known material also requires storage at low temperatures (-18°C) in a freezer in a protective atmosphere.
Furthermore, in yet older methods a gel like collagen is injected multiple times during treatment. Such a gel is not form stable and is degradable in the body and shows shrinkage.
It has also been proposed to add non-resorbable particles to the gel. Because the particles 10 are to be co-injected with the gel, the particle size needs to be small. However, small particles tend to migrate through the body. Therefore these older methods do not provide a long-lasting effect.
In practice the standard treatment comprises anchoring a tightened tape or strip around the urethra in the surrounding body tissue in order to counteract incontinence. However, if the 15 tape is not positioned well, a patient cannot be treated any longer, and is deemed to suffer from incontinence always.
Therefore, it is an object of the present invention to provide a composition for use in a broad number of soft tissue treatments, such as strengthening of (muscle) tissue, in particular for treating incontinence and GERD.
20 Another object of the present invention is to provide a composition for such use, which is stable in time after curing.
Yet another object of the present invention is to provide a composition for such use, which is easy to compose from the individual components thereof.
A further object of the present invention is to provide a composition that does not show one or 25 more of the drawbacks mentioned above, or at least to a lesser extent.
It is also an object to provide a composition for use in treating incontinence that has been treated insufficiently and/or ineffectively by older methods, in particular the method of applying a tape or strip.
30 SUMMARY OF THE INVENTION
Accordingly the present invention provides a composition for use in treatment of soft tissue in a living creature with bulking material prepared in situ from a composition comprising an addition curable polysiloxane system.
The present inventors have discovered that many of the drawbacks described above relate to 35 the curing mechanism of the polysiloxanes. The composition disclosed in EP-A2-1516636 is crosslinked through a so called condensation cure mechanism, wherein upon crosslinking propanol is splitted out. This is believed to be a main cause of the shrink of the known material. Contrary to a condensation cure mechanism, a composition according to the 3 invention is crosslinked by means of an addition cure mechanism, wherein the polymeric base, a polysiloxane, reacts with a crosslinker without generating a byproduct. Such a byproduct is considered to be responsible for shrink and degradation over time. In addition, addition curable polysiloxane compositions according to the invention can be prepared in a 5 1:1 ratio from the components that are generally contained in a two container dispensing system having containers of equal volume. In such a dispensing system the almost equal volumes of the starting components can be maintained separately until needed.
The starting materials of this system do not need to be stored at low temperatures. Usually the addition curable polysiloxane system can be processed up to about 10-20 minutes, e.g.
10 15 minutes. Thereafter curing has advanced to such an extent that the viscosity becomes too high for application, e.g. by injection. Injection is usually monitored by X-ray imaging. The composition is less susceptible to breakdown over time (non-resorbable), as a result stability and effect are longlasting.
The present invention also provides a prepackaged addition curable polysiloxane system for 15 use in soft tissue treatment in a living creature with a bulking material prepared in situ from a composition comprising an addition curable polysiloxane system, comprising a two component dispensing device having two containers separated from each other by a temporary seal. In a first container at least a catalyst is contained. The other container contains at least a crosslinker. Base polysiloxane polymers may be present in both 20 containers.
The invention further provides the use of an addition curable polysiloxane system in manufacturing a composition for use in treating soft tissue in a living creature with a bulking agent prepared in situ from said composition that comprises the addition curable polysiloxane system.
25 The invention also comprises a method of treating soft tissue in a living creature with a bulking agent prepared in situ from a composition comprising the addition curable polysiloxane system comprising a step of applying an addition curable polysiloxane composition comprising a polysiloxane having an ethylenically unsaturated moiety, preferably an ethylenically unsaturated moiety terminated polysiloxane, a crosslinker and a catalyst in 30 effective amounts for allowing an addition curing in situ, in the respective soft tissue and a step of allowing said composition to cure.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In this specification "soft tissue" refers to tissues that connect, support or surround other 35 structures and organs of the body, not being bone. Soft tissue includes tendons, ligaments, fascia, skin, fibrous tissues, fat and synovial and mucosal membranes, and muscles, nerves and blood vessels.
4
The composition according to the invention is introduced in soft tissue and cures in situ by means of a so called addition cure mechanism. Basically this mechanism involves the addition reaction of polyfunctional silicon hydride to unsaturated groups in polysiloxane chains. Although E-modulus of the cured material is higher than the E-modulus of the known 5 polysiloxane based materials, the cured material maintains a certain degree of flexibility due to the relatively long chains. This balance of properties results in a reduced risk of cracking and/or fracturing. And even, if fracturing occurs, migration is less likely.
The composition can be used in a broad spectrum of soft tissue treatments, wherein said soft tissue is not part of organs. Preferred treatments comprise treatment of incontinence, 10 treatment of reflux, reconstruction surgery, cosmetic surgery, tissue expansion and filling a cavity caused by surgery, in particular after prostatectomy. Incontinence treatment is applicable to both urinary and faecal incontinence, e.g. stress-induced incontinence. Examples of reflux treatment comprise GERD, renal reflux and others. Reconstructive and cosmetic surgery using the composition according to the invention can be performed at a 15 number of body parts including ear, nose, eyelid, nipple, breast, face, penis enlargement, vagina reduction.
In a preferred embodiment the addition curable polysiloxane reactive system comprises a polysiloxane having ethylenically unsaturated moieties. The ethylenically unsaturated moiety or moieties can be present on an end Si, but also as a substituent to the polysiloxane. Vinyl 20 and unsaturated aromatics such as phenyl are preferred examples of these moieties.
Preferably an ethylenically unsaturated moiety terminated polysiloxane, more preferably a vinyl terminated polysiloxane such as vinyldialkyl terminated dimethyl polysiloxane, even more preferably a vinyldimethyl terminated dimethyl polysiloxane is used in the addition curable polysiloxane system. The above polysiloxanes are commercially available from 25 several manufacturers including Nusil, Dow Corning and UCT.
The addition curable polysiloxane system also comprises a catalyst, in particular a precious metal catalyst, preferably Pt. More preferably this catalyst is present as an organic Pt(0) complex such as a Pt(0) vinyl siloxane complex.
The addition curable polysiloxane system also comprises a crosslinker for addition curing of 30 the base polymeric polysiloxanes described above. Typically the crosslinker will be a hydrosilicone crosslinker having a number of hydrogen atoms capable of reaction with the ethylenically unsaturated groups of the base polymer(s). Preferably, the crosslinker comprises hydrogendialkyll terminated siloxy groups, preferably hydrogendimethyl terminated siloxy groups. Another preferred type of crosslinker is polyalkyl hydrosiloxanes wherein 35 hydrogen is present in each unit of the siloxane chain. Polymethylhydrosiloxanes are an example. The crosslinker will hydrosilylate olefins in the presence of precious metal catalysts, such as Pt.
5 A system according to the invention is typically such that the viscosity thereof allows extrusion through a needle, e.g. an 11 gauge needle, and such that easy application is possible. Curing takes place at low temperature. During in vivo curing the local temperature will not raise higher than 40°C, in particular not higher than body temperature, so that no damage occurs.
5 Typically the addition curable polysiloxane system also comprises a tracer in order to monitor the progress of the treatment of the invention, in particular a material traceable by ultrasound as used in echoscopy and/or a radiopaque material for monitoring by X-rays. Suitable tracer materials include silver powder, barium sulphate, bismuth trioxide, zirconium dioxide, tantalum or titanium powders or fibers, calcium sulphated, calcium phosphate, 10 hydroxyapetite, tri calcium phosphate, and other medically appropriate opacifier agents. A preferred tracer material is titanium dioxide, which can be traced very well using ultrasound and is also capable of being traced using X-rays. Furthermore this material does not settle in the base composition parts, contrary to silver powder and barium sulphate. It has also appeared that echoscopy suffices in a number of treatments to monitor the deposition sites of 15 the addition curable polysiloxane system. This is beneficial as echoscopy is frequently experienced less heavy compared to X-ray examination. In a further preferred embodiment a bactericidal agent is also present in the composition. Silver powder is an example thereof. Preferably the bactericidal agent comprises a Ag + zeolite, especially a Ag + nano zeolite. Such a zeolite does not settle, allows ion exchange, e.g. substitution of silver ions by sodium 20 ions from the body. This is a relatively slow process thereby effectively extending the time period during which Ag ions are released. Furthermore this bactericidal agent prevents the formation of a so called biofilm affecting adhesion and promoting inflammation risk. Ag zeolite has also radiopaque properties.
A non-resorbable filler like silicate could also be present in the addition curable polysiloxane 25 system according to the invention. Like the tracer material and bactericidal agent these particles are permanently encapsulated in the silicone polymer matrix upon curing. The composition is advantageously packaged as a kit of parts, comprising at least a first container with a catalyst, and a second container with the cross-linking agent, wherein advantageously the base polysiloxane polymer(s) is/are present in both containers. A double barrelled syringe 30 is a preferred example of such a kit of parts.
In a further preferred embodiment the addition curable polysiloxane system is provided as a two component system, comprising as part A in a first container: a polysiloxane having an ethylenically unsaturated moiety, a catalyst, 35 - optionally a tracer material, a bactericidal agent and/or a filler and as part B in a second container; a polysiloxane having an ethylenically unsaturated moiety, a crosslinker, 6 optionally a tracer material, a bactericidal agent and/or a filler.
A preferred embodiment of a two component dispensing device comprises a double barrelled syringe having two parallel cylindrical compartments, each provided with a plunger, the ends thereof outside the compartments are coupled. The outlets of each compartment exit into a 5 mutual outlet, which before actual use is preferably provided with a static mixer. A small diameter tube such as a catheter, or a needle assembly is attached to the static mixer.
For treating female urinary incontinence the composition is preferably deposited in the tissue surrounding the urethra at various circumferential positions, e.g. 3 positions rotated by 120° forming an interrupted annulus of cured material.
10 Instead of a static mixer a two component injection device including an internal mixer, as for example disclosed in PCT/NL2004/000827 and PCT/NL2005/000268, can be used. The preferred, advantageous and/or beneficial embodiments of the various components of the composition similarly apply to this embodiment.
In particular, the composition is packaged in a syringe having two containers temporarily 15 sealed from each other, wherein a first part comprising the catalyst of the reactive system is present in a first container and a second part comprising the crosslinker of the reactive system is present in a second container. Preferably the first and second containers comprise, part A and part B as described above.
After filling the package and content are subjected to a sterilizing treatment. It has appeared 20 that sterilizing using ethyleneoxide as a sterilizing agent is effective.
Advantageously the addition curable polysiloxane is applied in an effective amount for achieving a durometer of about 25-50 Shore A, a tensile strength of 400-800 psi, and elongation of 120-175%.
The invention also relates to a prepackaged addition curable polysiloxane system for use in 25 soft tissue treatment in a living creature, in particular a human being, with a bulking material prepared in situ from a composition comprising an addition curable polysiloxane system, comprising a two component dispensing device having two containers separated from each other by a temporary seal, wherein a first container comprises as part A: a polysiloxane having an ethylenically unsaturated moiety, 30 - a catalyst, optionally a tracer material, a bactericidal agent and/or a filler and as part B in a second container; a polysiloxane having an ethylenically unsaturated moiety, a crosslinker, 35 - optionally a tracer material, a bactericidal agent and/or a filler.
The preferred, advantageous and/or beneficial embodiments of the various components of the composition similarly apply to this device. Advantageously this package also comprises a mixing means, preferably a static mixer, and/or at least one injection needle.
7 A further aspect of the invention concerns the use of an addition curable polysiloxane system in preparing a composition for use in soft tissue treatment in a living creature. The preferred, advantageous and/or beneficial embodiments of the various components of the composition similarly apply to this use according to the invention.
5 The invention also provides a method of treating soft tissue in a living creature, in particular treatment of incontinence, reflux, and in filling a cavity resulting from prostatectomy, reconstructive and cosmetic surgery, comprising the step of incorporating an addition curable polysiloxane composition comprising an ethylenically unsaturated moiety terminated polysiloxane, a crosslinker and a catalyst in effective amounts for allowing an addition curing 10 in situ, in the respective soft tissue and allowing said composition to cure. The preferred, advantageous and/or beneficial embodiments of the various components of the composition similarly apply to this use according to the invention.
In treating incontinence the injectable composition is delivered in the tissue surrounding the urethra, e.g. at 3 positions spaced apart by 120°. In a preferred embodiment the material is 15 applied at 4 positions, in particular at 2, 5, 7 and 10 hours. The amounts applied at each position may be equal, but can also differ, e.g. at 2 and 10 hours in the range of 0.5-0.8 ml and at 5 and 7 hours 0.8-1.4 ml.
Positioning of the injection needles and delivering the composition is monitored by a scope integrated in an applicator provided with plural carrier positions for the injection device, e.g. 20 as indicated above.
Claims (13)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2008861A NL2008861C2 (en) | 2012-05-23 | 2012-05-23 | Composition for soft tissue treatment. |
| US13/900,831 US20130315854A1 (en) | 2012-05-23 | 2013-05-23 | Composition For Soft Tissue Treatment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2008861A NL2008861C2 (en) | 2012-05-23 | 2012-05-23 | Composition for soft tissue treatment. |
| NL2008861 | 2012-05-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL2008861C2 true NL2008861C2 (en) | 2013-11-26 |
Family
ID=49621775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2008861A NL2008861C2 (en) | 2012-05-23 | 2012-05-23 | Composition for soft tissue treatment. |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20130315854A1 (en) |
| NL (1) | NL2008861C2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10173027B2 (en) * | 2015-10-07 | 2019-01-08 | Cook Medical Technologies Llc | Methods, medical devices and kits for modifying the luminal profile of a body vessel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278258A (en) * | 1992-05-18 | 1994-01-11 | Allergan, Inc. | Cross-linked silicone polymers, fast curing silicone precursor compositions, and injectable intraocular lenses |
| EP1516636A2 (en) * | 2003-09-19 | 2005-03-23 | Broockeville Corporation N.V. | Use of a curable elastomer-precursor for a medical treatment |
| WO2009118203A2 (en) * | 2008-03-27 | 2009-10-01 | Broockeville Corporation N.V. | A vertebroplasty method using an addition curable polysiloxane system |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340709A (en) * | 1980-07-16 | 1982-07-20 | General Electric Company | Addition curing silicone compositions |
| US4537943A (en) * | 1983-07-21 | 1985-08-27 | Innovative Surgical Products, Inc. | Correction of defects in the eye and compositions therefor |
| US4938763B1 (en) * | 1988-10-03 | 1995-07-04 | Atrix Lab Inc | Biodegradable in-situ forming implants and method of producing the same |
| JPH0762242A (en) * | 1993-08-27 | 1995-03-07 | Shin Etsu Chem Co Ltd | Antimicrobial - mildewproofing silicone rubber composition |
| US6552104B1 (en) * | 1995-04-13 | 2003-04-22 | Dentsply Research & Development Corp. | Method of making hydrophilic non-sweating polymerizable dental impression material |
| EP0873145A2 (en) * | 1996-11-15 | 1998-10-28 | Advanced Bio Surfaces, Inc. | Biomaterial system for in situ tissue repair |
| US8067031B2 (en) * | 2004-04-28 | 2011-11-29 | Angiodevice International Gmbh | Compositions and systems for forming crosslinked biomaterials and associated methods of preparation and use |
| WO2006138669A2 (en) * | 2005-06-16 | 2006-12-28 | Artes Medical, Inc. | Life-like anatomic feature for testing injection of soft tissue fillers |
| CA2707649A1 (en) * | 2007-11-02 | 2009-05-07 | Genzyme Corporation | Methods of augmenting or repairing soft tissue |
-
2012
- 2012-05-23 NL NL2008861A patent/NL2008861C2/en not_active IP Right Cessation
-
2013
- 2013-05-23 US US13/900,831 patent/US20130315854A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278258A (en) * | 1992-05-18 | 1994-01-11 | Allergan, Inc. | Cross-linked silicone polymers, fast curing silicone precursor compositions, and injectable intraocular lenses |
| EP1516636A2 (en) * | 2003-09-19 | 2005-03-23 | Broockeville Corporation N.V. | Use of a curable elastomer-precursor for a medical treatment |
| WO2009118203A2 (en) * | 2008-03-27 | 2009-10-01 | Broockeville Corporation N.V. | A vertebroplasty method using an addition curable polysiloxane system |
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| US20130315854A1 (en) | 2013-11-28 |
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